[Coco] I have a bad/ good 6809?

L. Curtis Boyle curtisboyle at sasktel.net
Tue Jan 21 19:41:20 EST 2020

Yes. That’s a sign that the CPU is blown - maybe the NMI line? I can’t remember the details, but I have had to replace my CPU for the exact same reason. 

Sent from my iPhone

> On Jan 21, 2020, at 5:26 PM, rietveld rietveld <rietveldh at hotmail.com> wrote:
> I have a 6809 in one of my coco3 's. It seems to work perfectly with my sdc, my hard drive but not with the fd501?    When I try to do a DSKINI the computer goes crazy and locks up.   I swapped this cpu into another coco3 with a different disk controller (disto) and it does the same thing.   When I replace the 6809 with a different one the drive works perfectly.    As anyone ever seen this before?
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